//-*- Mode: C++ -*-

//* This file is property of and copyright by the ALICE HLT Project        *
//* ALICE Experiment at CERN, All rights reserved.                         *
//* See cxx source for full Copyright notice                               *

#ifndef ALIHLTTPCCATRACKLETCONSTRUCTOR_H
#define ALIHLTTPCCATRACKLETCONSTRUCTOR_H

#include "AliHLTTPCCADef.h"
#include <AliHLTArray.h>

class AliHLTTPCCASliceData;

class AliHLTTPCCAParamArBB;
#include "AliHLTTPCCAParamArBB.h"
/**
 * @class AliHLTTPCCATrackletConstructor
 *
 */
class AliHLTTPCCATrackletConstructor {
 public:
  inline AliHLTTPCCATrackletConstructor(
  nested_my<AliHLTTPCCARowHit>& rows_ArBB, const dense<f32>& rowsX,
  const AliHLTTPCCAParamArBB& sliceParam,
  const AliHLTTPCCAStartHitId_ArBB::TDense<1>& startHits_ArBB,
  AliHLTTPCCATrackletVector_ArBB& trackletVectors_ArBB
    )
    : fRows_ArBB(rows_ArBB), fRowsX(rowsX), fSliceParam( sliceParam ), fStartHits_ArBB(startHits_ArBB), fTrackletVectors_ArBB(trackletVectors_ArBB) {}

  void run();

  struct TrackMemory;
  struct TrackMemory_ArBB;
 private:
    // for use ArBB

  nested_my<AliHLTTPCCARowHit>& fRows_ArBB;
  const dense<f32>& fRowsX;
  
  const AliHLTTPCCAParamArBB& fSliceParam;
  const AliHLTTPCCAStartHitId_ArBB::TDense<1>& fStartHits_ArBB;
  AliHLTTPCCATrackletVector_ArBB& fTrackletVectors_ArBB;
  static void FitTracklet_ArBB( TrackMemory_ArBB &r, const TRowI2_ArBB rowIndex, AliHLTTPCCARowHit::TDense<1>& row,  const f32 rowX, const AliHLTTPCCAParamArBB& sliceParam, AliHLTTPCCATrackletVector_ArBB& trackletVector );
  
  static void run_ArBB( nested_my<AliHLTTPCCARowHit>& rows_ArBB, const dense<f32>& rowsX, const AliHLTTPCCAParamArBB& sliceParam, const AliHLTTPCCAStartHitId_ArBB::TDense<1>& startHits, AliHLTTPCCATrackletVector_ArBB& trackletVector );
  
    // end for use ArBB
  
    // add one hit from chain to track
  void FitTracklet( TrackMemory &r, const int rowIndex, const ushort_v trackIndex, TrackletVector &trackletVector );
    // find nearest hit on row and set it as currentHit (see TrackMemory)
  void FindNextHit( TrackMemory &r, const AliHLTTPCCARow &row,
                    sfloat_v::Memory &dy_best, sfloat_v::Memory &dz_best, short_m &active);
    // extrapolate on row and try to find hit belonged to track
  short_m ExtrapolateTracklet( TrackMemory &r, const int rowIndex, const ushort_v trackIndex, TrackletVector &trackletVector, const bool dir, const short_m &mask );

    // performs both: fitTraclet & Extrapolation
  short_m ExtendTracklet( TrackMemory &r, const int rowIndex, const ushort_v trackIndex, TrackletVector &trackletVector, const bool dir, const short_m &mask ); 

};

#endif